---
id: 5d822fd413a79914d39e98dc
title: Hatua ya 20
challengeType: 0
dashedName: step-20
---

# --description--

Majengo hayo kwa sasa yamepangwa juu ya kila moja. Pangilia majengo kwa kugeuza kipengele cha `.background-buildings` kuwa mzazi wa flexbox. Tumia sifa za `align-items` na `justify-content` ili kuweka majengo kwa usawa katika sehemu ya chini ya kipengele.

# --hints--

Unapaswa kuongeza `display` ya `flex` kwenye class ya `background-buildings`.

```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.background-buildings')?.display, 'flex');
```

Unapaswa kuongeza `align-items` ya `flex-end` kwenye class ya `background-buildings`.

```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.background-buildings')?.alignItems, 'flex-end');
```

Unapaswa kuongeza `justify-content` ya `space-evenly` kwenye class ya `background-buildings`.

```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.background-buildings')?.justifyContent, 'space-evenly');
```

# --seed--

## --seed-contents--

```html
<!DOCTYPE html>
<html lang="en">    
  <head>
    <meta charset="UTF-8">
    <title>City Skyline</title>
    <link href="styles.css" rel="stylesheet" />   
  </head>

  <body>
    <div class="background-buildings">
      <div class="bb1">
        <div class="bb1a"></div>
        <div class="bb1b"></div>
        <div class="bb1c"></div>
        <div class="bb1d"></div>
      </div>
      <div class="bb2"></div>
      <div class="bb3"></div>
      <div class="bb4"></div>
    </div>
  </body>
</html>
```

```css
* {
  border: 1px solid black;
  box-sizing: border-box;
}

body {
  height: 100vh;
  margin: 0;
  overflow: hidden;
}
--fcc-editable-region--
.background-buildings {
  width: 100%;
  height: 100%;
}
--fcc-editable-region--
.bb1 {
  width: 10%;
  height: 70%;
  display: flex;
  flex-direction: column;
  align-items: center;
  --building-color1: #aa80ff;
}

.bb1a {
  width: 70%;
  height: 10%;
  background-color: var(--building-color1);
}

.bb1b {
  width: 80%;
  height: 10%;
  background-color: var(--building-color1);
}

.bb1c {
  width: 90%;
  height: 10%;
  background-color: var(--building-color1);
}

.bb1d {
  width: 100%;
  height: 70%;
  background-color: var(--building-color1);
}

.bb2 {
  width: 10%;
  height: 50%;
}

.bb3 {
  width: 10%;
  height: 55%;
}

.bb4 {
  width: 11%;
  height: 58%;
}

```

